Fuse for projectiles



Sept. 17, 1935. M. L. MATHsEN V r A2,014,393

FUSE FOR PRoJEcTILEs Filed June 4. 1954 fig-1- Fefeffi5-4f Marvin L- Mathsen Patented Sept. 17, 1935 UNITED STATES FUSE FOR PROJECTILES Marvin L. Matlisen, Rockaway, N. J.

Application June 4,

1934, serial Nanveasie l 3 Claims. (Cl. 102,-39) (Granted under the act of March 3, 1883, as

amended April The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the lpayment to me of any royalty thereon.

This invention relates to a fuse for projectiles. j

'Ihe principal object of the invention is to provide a. bore-safe fuse in which a pair of relatively movable members are connected by linkage which function during ight to move one of the members to unarmed position and to hold it in such position until impact.

A further object is to associate one of said members with a mask whereby the mask cannot be removed until the fuse is in flight.

Another object is to provide astriker and ring pin with a bore-safe device.

With the foregoing and other objects in view,

may be made within the scope of what is claimed Without departing from tion.

A practical embodiment of the invention is illustrated in the accompanying drawing, wherein: Fig. 1 is a longitudinal sectional view of a fuse constructed in accordance with the invention and showing the parts in normal position.

Fig. 2 is a fragmentary sectional view showing the parts in position during flight.

Fig. 3 is a similar view of a modification.

Fig. 4 is a longitudinal sectional view of a further modication.

Referring to Figs. 1 and42 the fuse comprises a casing formed by a body 5 threadedly connected to a base 6 and a nose 1.

The base carries the usual booster charge 8, detonator 9 and houses a conventional rotor I0 mounted on a pivot pin II. When the rotor is in armed positionya primer I2 carried thereby is positioned axially of the fuse and in line with the detonator.

'I'he rotor is normally held in the unarmed position, masking the detonator by means of a transversely disposed bolt I3 adapted to be withdrawn from engagement with the rotor due to the action of centrifugal force and it is also held against rotation by the point I4 of a ring pin which is disposed in a blind cavity I5 in the rotor.

A ring pin I6 and a striker I'I are positioned axially of the fuse casing and are arranged with their adjoining ends intertted. the lower end I8 of the striker is provided with a the spirit of the inven-l socket I9 for receiving the reduced upper end 20 of the firing pin. A spring 2I in the socket normally urges the ring pin and striker apart and maintains the point I4 of the ring pin'in the blind cavity I5 of the rotor. 5

The ring pin and striker are connected by a plurality of sets of linkages, each consisting of a pair of links 22 and 23, respectively attached to the firing pin and striker by pivot pins 24 and 25 and linked to one another by a pivot pin 26. The l0 adjoining end portions of the links carry weights 21.

The lower end 28 For convenienceA in manufacture bling the striker I1 includes a front part IIa which protrudes from the nose 1 of the casing. 20 A pin 32 in the nose I enters a longitudinally extending groove 33 in the part I'la and restrains the striker, against rotational displacement. A

A sleeve 36 surrounding the spring 34 holds it against excessive lateral displacement.

In the modication shown in Fig. 3 the ring and need not be provided with a primer.

In the modification shown in Fig.' 4 the striker 39 -is in one piece and the firing pin 40 enters an aperture 4I in the base 42 of the fuse casing. It 35 directly engages a transversely movable slide 43. which masks the primer-detonator 44.

The operation of the fuse shown in Figs. 1 and the parts assume the positions shown in Fig. 2. The bolt I3 is moved by 'centrifugal force out of engagement with the rotor and the adjoining ends of the links 22 and 23, moving outward under the influence of centrifugal force, withdraw the firing pin from the rotor. The rotor, being now free, turns under the action of centrifugal force andv positions theprimer I2 in line with the detonator 9 and the point I4 of the ring pin.

On impact the striker and the iring pinv are driven rearwardly to actuate the primer. In ythe mally urging I claim. i 1. In a fuse. a casing, an explosive unit in the casing, a member masking the explosive unit and mounted for movement to unmasking position, a striker `having its front end passing through the nose of the casing and having a socket-in its rear end, a spring normally holding the striker in for-- ward position with its front end protruding from the casing, a flring'pin having its front end disposed in the socket of the striker, a spring conned between the striker and firing pin and northe firing pin rearwardly into the path of movement of the masking member and linkages connecting the striker and firing pin and operable by centrifugal force to withdraw the ring pin from the path of movement of the masking member.

2. In a fuse, a casing, an explosive unit in the casing, a member masking the explosive unit and mounted for movement to unmasking position, a striker having its front end passing through the nose of the casing, a spring normally holding the striker in forward position with its front end protruding from the casing, aring pin in line with the striker,.a. spring confined between the striker and firing pin and normally urging the firing pin striker and ring pin and operable by .centrifugal force to withdraw the ring pin from of movement of the masking member.

3. In a fuse, a striker, a firing pin coaxial with the striker, a spring normally urging the striker and firing pin apart, and linkages connecting the striker and firing pin and operable by centrifugal force during night of the fuse to relatively move the striker and ring pin towards one another. MARVIN L. MATHSEN.

the path of movement of the 

